The researchers studied how land use has changed in the border areas of different provinces in China over the past 30 years. They used satellite images and advanced technology to analyze the data. They found that there have been significant changes in the types of land being used, with more construction land being added and unused land decreasing. Different regions have different dominant land types, like forestland in the northeast and grassland in the southeast. The changes in land use were influenced by factors like population growth and economic development. Overall, the increase in construction land by 2030 is expected to benefit the region's economy and society.